Calculating-machine.



(LL. NELSON.

' CALCULATING MACHINE. APPLICATION FILED MAB..27, 1911.

Pate fited Feb. 4, 1913.

5 SHEETS-SHEET 2.

IN VN YOK G L. NELSON.

I CALCULATING MACHINE. APPLICATION 1311.31) MAR. 27, 1911.

JV t av-Z LNe/son.

G L. NELSON. GALCULATING MACHINE;

APPLIGATION FILED MAR. 27, 1911 Patented Feb. 4, 1913.

INVEN 70/? Carl L. Nelsen wr/vzsass 0. L. NELSON. CALCULATING MACHINE. APPLICATION FILED MAR. 27, 1911 Patented Feb. 4, 1913.

5 SHBET$ S HEET INYCNT'OR Carl L. Neism upon the line ,X, X. of Fig. 4. Fig. 8 is a stares QFFIGE.

CARD 1.. unison, or snn'rrnnwnsnriveroiv.

GALGULATIltTG-MACIHINE.

To all whom it may concern:

Be it known that I, CARL L. NELSOi\'-, a

' citizen of the United States, andi'esident of the city of Seattle, in the county of King will be hereinafter described and particu- ,larly pointed out in the claims.

1 The object of my invention is to improve and simplify the mechanism and operation of machinesof this kind, particularly of those machines shown in my prior Patents No. 897,768 of September 1, 1908, and No.

933,486 of September 7, 1909.

More specifically, the object of my invention is to provide an improved form of mechanism for controlling the printing platen and the paper carried thereby E0 bring the amount printed into plain view immediately after printing, and to shift the paper holding mechanism laterally of the line of feed to enable printing of extr tt thereon Without affecting the usual printing 1 I or adding mechanisms and without feeding the aper.

T e accompanying drawings illustrate, and the following specification describes,

' the embodiment of my invention in the form which is now preferred by me.

Figure lis a plan view of my machine, part of the keyboard'an'd the front end of the casing being cut away. Fig. 2 is a side elevation of the machine, the rear part being cut away, sliowingthe parts in the printing position. Fig. 3 is a side elevation of the opposite side of the machine. Fig. 4

'isa plan view of the paper carriage, shifted into position for printing of supplemental matter at the left of the column. Fig. 5 is a longitudinal section through the central portion of said carriage. theparts being in the same position as in Fig. at. Fig. 6 is an elevationof the left hand end of the carriagp, thestem of the hand wheel being in section. Fig. 7 1s a section and elevation section of the carriage on the line Y, Y. of

Fig. at. Fig. 9 is a side elevation of the mechanismfor controlling the dating mechanism and of themechanism for throwing the hammers out of operation. Fig. 10 is a i Specification of Letters Patent.

plan view of the mechanisms shown in Fig.

9. Fig. 11 shows, in elevation, the means Patented Feb.4,1913. Application filed March 2?, 1911. Serial No. 617,274. I

plan, the mechanism for setting the dating type bar.

The machine as herein shown is, in most respects, similar in its construction'to the machines shown in the prior patents of mine hereinbefore referred to. It differs from that shown in said patents in the'immaterial point of having nine rows of keys and printing mechanisms instead of six. The design and construction of the carriage is however entirely different from that shown in either of said machines. In said machines the printing upon the paper strip was out of sight and could not be inspected except with considerable difliculty or without the strip having been fed for ward a considerable distance. In the present invention, the figures printed upon the strip are normally in plain view, the carriage turning down for the printing operation, but immediately turning back to expose thefigures printed.

The carriage, designated as a whole by the character C, is'mounted upon a hollow shaft 3, which extends transversely of the machine and above the casing. This shaft 3 is journaled in bearings carried by standards 20 at each end of the shaft and at opposite sides of the casing A. Upon this shaft, at the left hand end, is secured a plate- 2, upon which is mounted the paperfeed operating mechanism. Upon the same shaft is mounted'the carriage G, which receives and feeds the paper. Th s is shown in section and elevation in Figs. 1, 5, 7 and S. The frame of this carriage consists of the end platesl, 1. and the connecting tube 10 which is secured to said end plates. In the end plates 1. 1, are journaled two paper feeding rollers 11 and 12. which are preferably covered with some good frictional material and receive the paper, represented by the broken lines I, P, between them.

The printing platen, herein shown as a flat ,bar, 22, of suitable material, is secured within a trough shaped holder 21 which extends between the heads 1, 1. The paper is held against this by a tension device consisting of a spring plate 23 which is supported by a bar 24 extending between the heads 1. 1. The paper; upon leaving the a plate 15 which a down by springs ctmgpms l8 The so torn on must-the edge oi The normal position the carriage is as shown in igs. 1 an 3 with its left hand endisdjacent the plate 2, and the printing platen up, as shown in Fig. 8. "ihe carriage as a whole, or that part which carries the paper mechanism, is movable length Wise the shaft 3, into the position shown in Figs l a d 5. This is done when it is de-. sired to int a date, or other matter, to the left oi the column. This is done by the following mechanisms: The shaft 3 is hollow and has a spring 30 therein, one end being connected with a pin 31 which joins the shaft and the bushing to which the plate 2 is secured, and the other end being connected with similar pin32, which passes through the hashing which carries the plate 1,:it the right hand-end of the carriage. The pin 32 passes through a guide slot 35 in the shaft 3, which slot defines the movement possible for the carriage upon the shaft 3. To the pin 32 is connected a chain 34, or other flexible connector, which passes out the hollow shaft through a hole 33, thence about a wheel 33, thence to the left hand side. or the casing", about a wheel 37, thence forward and about; wheels 38 and 39 on the side of the casing and is connected with a shifting lever 49 which is pivoted at 40. -When lever 49 is ih t'he position shown by-full lines in Fig. 3 the carriage is in its normai position, that shownin Fig.

L When the lever 49 is shifted to the position shown by dotted lines in Fig. 3, the carriage is shi ted to the position shown in Figs. 4 and 5. The carriage is returned to and held in its normal position by spring 30.

The end ot the roller 11 next the plate 2 is provided with a ratchet or clutch device let; the teeth of which are adapted to normally engage a like member 19, mounted to turn in the plate2. Upon the opposite side of the plate 2 is a ratchet wheel 25, secured in tegral with the ratchet clutch 19. An arm 26 is pivoted upon the journal of the parts 19 and 25 and carries a pawl=27 engaging the ratchet wheel 25, the pawl and arm 26 being held down by a spring 29, and limited in this direction by a stop pin 50. Upon the left hand end of the shaft 3, outside the fixed plate 2, is secured one end of a spiral spring 5, the other end of which is secured to the casing, as shown at 51, Fig. 1. The

tendency cf-this spring is to turn the car- I'lage so that the printing surface 22 will swingunder he shaft Upon the opposite or right hand end of the shaft 3 is a pulley wheel 6 to which is secured a chain 60 which leads downward, beneath a guide wheel or, and isQsecured to awhecl 61 which has a toothed segment, its teeth engaging with a similar toothed segmentnponthe pivot end of the main operating lever 63. This lever 63 is the same lever'shown in my prior patents, by means of wl'tich the greater part or" the mechanisms are operated. When the lever 63 is thrown down to the position shown in full lines in Fig. 2, the tension-of the chain 60 upon the carriage. is released, permitting the carriage to turn, under the action of spring 5, so as to swing the printing surface 022 downward, into-position to receiie the impression of the type. As the carriage swings downward, the roller '28 upon arm 26, engages one or the other of two trackways and stops 51 or 52, depend ing upon the adjustment thereof. The tracltway 51 which is-farthest toward the left is also the lowermost. The outer ends of each turns upward to form a stora53, for the roller 28 to stop the swing of thecarriage. The angular movement given to the arm '26 by engagement withthe trackunv 51 is sufficient to move the ratchet wheel 25 one tooth, thisdlstance represcntlng a smgle .line feed of the paper. If it is desired to give the paper a double line feed, then' The size of the wheel 61 to which this chain is secured and by which it is actuated, is greater than that of the Wheel- 3, and the stops limiting the swing of the carriage are brought into action before the end-or" the swing of the lever 63. It therefore follows that aceitain amount of slack is roduccd. in the chain 60 at "each movement of the lever 63. This. is shown by the full-lino position of the chain shown in Fig. 2. The taut position of the chain, or that occupied during rest when not printed and during the swinging movement, is indicated by the dotted lines. ,The duration of this sleek movement coincides with the printing artion and insures that the printing platen shall he at rest at thc'momeut of printing.

There are times when it may be tltfillfll h' to make use of the computing mechanism of the machine, cutting out the printing mechanisms' This would bedcsirahlc when doing multiplications by the method of re; pooling the factors. \Yhcu this is desired I may cut. out the printing mecl'muisms as follows: The plate 2 which is securcd to shaft a has anotch 58 in position to he engaged by the end of a bar mounted to bar 56 is pressed backward to engage and lock the carriage, the rock shaft is actuated 4o carries a pointer 82 adapted to indicate upon notch 58 to lock the carriage against turning. This bar is'held in adjusted position by clamping bolt 57. When the carriage is thus locked in its upper or visible position, the operation of the printing mechanism is cut out. When the carriage is thus held out of printing-positi'on-it is desirable that the hammers which cause the printing action be also cut out of operation. I secure this result by the following means: The bar 56 which engages the carriage to prevent its turning down to the printing position, has a pin or arm,59 projecting through a slot in the casing in position to engage an arm 40 of a rock shaft v .This rock shaft has an-. other arm 41 having a side extending foot 42 in position to engage an extension ofthe pivot pin 43 upon which the hook members 45 swing to engage the hammers. When the to; throw. down the arm 41, thus throwing all the hammer operating mechanlsms down enough to prevent engagement with the the printing mechanisms.

In orderto provide means for printing a date when desired, Ihave provided a special dating type bar. This bar, 44, lies at the extreme left of the type bars, and-haslthe' types for printing the months thereon, as

v indicated 10 This bar is free from such controlas is employed in connection with the other type bars. It is mounted, to slide from front ,to rear and is controlled in position wholly byhand. It has a side extending' arm '8 to which is secured .a hand button 80 the-shank of which extends up ward through a slot 83 in the casing, and

a scale 48 on top of the casing, the-month which is in position to print. Within the casing a bar 81 is provided with'holes '84 adapted to receive a lockingpin carried by the arm 8 to secure the dating bar in accurate adjustment for printing. When it is desired to print a date the dating type bar is set in position to indicatethe month. The day of the month, is printed by using the two rows of keys at the left. It is therefore necessary, when a date is to be printed, that the computing mechanism be cutout of action, to prevent vitiating the totals.

lhe mechanism, employed for printing from the'date bar is of the same type as is employed for printing. from the other typebars, and'the same as is shown and described in my prior patents referred to. Detailed description of these is therefore not considered necessary. This-mechanism. comprises a hammer 46 and a hammer depressing hook 45. The depressing hook 45 em- ,ployed'in connection with the date bar is,

however, not controlledby the same mechanism as is employed for controlling the same parts in-connection with the type bars. The means for controlling this is as follows: Mounted to have a limited reciprocation from front to rear alongside the hammer which acts upon the dating type bar, is a bar 76 which has a side projection 78 adapted to engage the hook 45 to bring1 it en into engagement- W th he hammer 46 w bar-'76 is drawn forward: Bar 76 hasii notch 77 receiving the end of an arm 74.

This arm 74 is an extension of thevertical arm 73, which is pivoted at 72 to the casing and has a horizontal arm 7 extending forward, its end being turned upward andextending out of the casin top as bar 70, in position to be engaged ythe same hand which throws the lever 49. By depressing the end 70 of this lever the hammer depressing hook 45 will be brought into engagement with its hammer, so that when the main lever 63 1s 0 erated, the hammer will be depressed and e date printed.

The lever 7 has afinger 71 which extends I over the leverT, which lever isthe totaling lever described and shown in said patents.- This lever controls the vertical osition of the adding or computing whee In an intermediate position of this lever these wheels are held out of engagement with both the upper and lower rack bars. See

lines to 126, page 14 of Patent No. --897,768, and lines 101 to 112 page 3 of Patent No. 933,486. The depression oflever 7 throws the adding wheelsputiof action,

, thus preventing adding in any figures which may be printed. It also secures engagement of the hammer depressi "hook for the hammer. which prints .the fate. This lever. 7 will remain down only whileheld'." 'ltsreturn will occur as soon as released, by the action of a spring 79- attached to the rear end of the bar 76. i a

When the carriage is shifted toward the right to printa date, it is desirable that the figures used for this purpose shall have noe ect upon the'adding mechanism. I secure this result as follows: The totaling lever T has a pin 25, projecting through a slot in the casingin position to be engaged by the shoulder 49 of the-lever 49 so as to depressthe lever T to its intermediate position, In

this position the adding wheels are in -their "intermediate positionfinengagement with" neither the upper or lower rack bars, and

operation of the printing mech'amsnr will not-affect the total. 1 WVhat I claim as my invention is 1, In an adding machine, in combination, adding mechanism, a printing mechanism, a paper holding and feeding carriage mounted to oscillate about theaxis, aspring acting to swing said 'carriage inonedirct olr, and means for swinging said carriage in the op,- posite direction, actuated from the printing operating Enema" I :3 slack conne'eti eoepi d '40 p ace apanse in the swing oi" the carriage h 7 I pant e in act on occurs,

the mee i'ength- Wise to turn with said shaft, paper feed roll and printing Eaten mounted upon said carriage, a step-oystep feed device mounted upon the shaft independent of the carriage, a rotative connection between said step-hy-step feed device and the feed roll en'gageahie and movement of the carriage, a Ste}; engaging the step-hystep' feed device and hmiting the swingo'f the carriage, and means for shifting t'he' erriege along its shaft to change the pointof printing thereon.

i 3. In en adding machine, combination,

disengageahie by endwise adding mechanism, printing mechanism, a

shaft extending transversely oif'the machine, a carriage mounted upon said shaft and heaving paper holding and feeding mechanisms, a spring connected with said shaft to turn it into'printing position, a stop limiting the turning action of said spring, a chain connected with said shaft to turn oppositely to the spring, and a main operating ieizer connected with said chain and giving CARL-L. NELSON.

Witnesses:

G. SPENCER, H.'L. REYNOLDS.

fiopies oftleis geizen't may be obtained for five cents each, by addressing the Commissioner of Patents,

Wasnington, I U. 

